Singleton Pattern example

Author: anupavanm

DesignPatterns.sln

@@ -11,6 +11,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "AbstractFactoryPattern", "A
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "BuilderPattern", "BuilderPattern\BuilderPattern.csproj", "{A2804858-D1F9-4849-8C7E-1AB4DA7F979E}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SingletonPattern", "SingletonPattern\SingletonPattern.csproj", "{A61E958E-B6C9-413F-BACA-EA23D38A7DF2}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -33,6 +35,10 @@ Global
 		{A2804858-D1F9-4849-8C7E-1AB4DA7F979E}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{A2804858-D1F9-4849-8C7E-1AB4DA7F979E}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A2804858-D1F9-4849-8C7E-1AB4DA7F979E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{A61E958E-B6C9-413F-BACA-EA23D38A7DF2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{A61E958E-B6C9-413F-BACA-EA23D38A7DF2}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{A61E958E-B6C9-413F-BACA-EA23D38A7DF2}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{A61E958E-B6C9-413F-BACA-EA23D38A7DF2}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE

SingletonPattern/Program.cs

@@ -0,0 +1,34 @@
+using System;
+
+namespace SingletonPattern
+{
+  public class President
+  {
+    static President instance;
+    // Private constructor
+    private President()
+    {
+      //Hiding the Constructor
+    }
+
+    // Public constructor
+    public static President get_instance()
+    {
+      if (instance == null) {
+        instance = new President();
+      }
+      return instance;
+    }
+  }
+  class Program
+  {
+    static void Main(string[] args)
+    {
+      President a = President.get_instance();
+      President b = President.get_instance();
+
+      Console.WriteLine((a==b).ToString());
+      Console.ReadLine();
+    }
+  }
+}

SingletonPattern/SingletonPattern.csproj

@@ -0,0 +1,8 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp2.0</TargetFramework>
+  </PropertyGroup>
+
+</Project>